<!-- 商品管理->商品列表->添加商品 -->
<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item :to="{ path: '/goods' }">商品列表</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图区域 -->
    <el-card>
      <!-- 提示区域 -->
      <el-alert title="添加商品信息" type="info" center show-icon :closable="false"></el-alert>
      <!-- 步骤条 -->
      <el-steps :space="200" :active="activeIndex - 0" finish-status="success" align-center>
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>
      <!-- tap栏区域 -->
      <el-form ref="addFormRef" :model="addForm" label-width="100px" :rules="addFormRules" label-position="top">
        <el-tabs :tab-position="'left'" v-model="activeIndex" :before-leave='beforeTabLeave' @tab-click="tabClicked">
          <el-tab-pane label="基本信息" name="0">
            <!-- 选择商品分类区域的下拉列表框 -->
            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader v-model="addForm.goods_cat" :options="catelist" :props="cateProps" @change="handleChange">
              </el-cascader>
            </el-form-item>
            <!--  -->
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number"></el-input>
            </el-form-item>
          </el-tab-pane>
          <!-- 商品参数 -->
          <el-tab-pane label="商品参数" name="1">
            <el-form-item :label="item.attr_name" v-for="item in manyTableData" :key="item.attr_id">
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox :label="cb" v-for="(cb,i) in item.attr_vals" :key="i" border></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <!-- 商品参数 -->
          <el-tab-pane label="商品属性" name="2">
            <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <!-- 商品图片 -->
          <el-tab-pane label="商品图片" name="3">
            <!-- action表示图片要上传的api地址 -->
            <el-upload action="http://127.0.0.1:8888/api/private/v1/upload" :on-preview="handlePreview"
              :on-remove="handleRemove" list-type="picture" :headers="headerObj" :on-success="handleSucess">
              <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <!-- 商品内容 -->
          <el-tab-pane label="商品内容" name="4">
            <!-- 富文本编辑器 -->
            <quill-editor v-model="addForm.goods_introduce" />
            <!-- 添加商品的按钮 -->
            <div class="addbtn">
              <el-button type="primary" @click="add">添加商品</el-button>
            </div>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>
    <!-- 图片预览 -->
    <el-dialog title="图片预览" :visible.sync="previewVisible" width="50%">
      <img :src="previewPath" alt="" class="previewImg">
    </el-dialog>
  </div>
</template>

<script>
  export default {
    data() {
      // 验证邮箱的规则
      var checkNumber = (rule, value, cb) => {
        const regNumber = /^[0-9]*$/
        if (regNumber.test(value)) {
          return cb()
        }
        //返回一个错误提示
        cb(new Error('请输入数字！'))
      }
      return {
        // tap栏和步骤条的数据共用的激活属性
        activeIndex: '0',
        // 添加商品的表单数据对象
        addForm: {
          goods_name: "",
          goods_price: "",
          goods_weight: "",
          goods_number: "",
          // 商品所属的分类数组
          goods_cat: [],
          // 商品所属的分类数组
          pics: [],
          // 商品的详情
          goods_introduce: '',
          attrs: []
        },
        // 添加商品表单验证对象
        addFormRules: {
          goods_name: [
            { required: true, message: '请输入商品名称', trigger: 'blur' },
          ],
          goods_cat: [
            { required: true, message: '请选择商品分类', trigger: 'blur' },
          ],
          goods_price: [
            { required: true, message: '请输入商品价格', trigger: 'blur' },
            { validator: checkNumber, trigger: 'blur' }
          ],
          goods_weight: [
            { required: true, message: '请输入商品重量', trigger: 'blur' },
            { validator: checkNumber, trigger: 'blur' }
          ],
          goods_number: [
            { required: true, message: '请输入商品数量', trigger: 'blur' },
            { validator: checkNumber, trigger: 'blur' }
          ],
        },
        // 商品分类列表
        catelist: [],
        // 级联选择框的配置对象
        cateProps: {
          label: 'cat_name',
          value: 'cat_id',
          children: 'children'
        },
        // 动态属性列表
        manyTableData: [],
        // 静态参数列表
        onlyTableData: [],
        // 图片上传组件的请求头对象
        headerObj: {
          Authorization: window.sessionStorage.getItem('token')
        },
        // 保存的图片地址
        previewPath: '',
        // 控制预览图片对话框的显示和隐藏
        previewVisible: false,

      };
    },

    created() {
      this.getCateList()
    },
    components: {},

    computed: {
      cateId() {
        if (this.addForm.goods_cat.length === 3) return this.addForm.goods_cat[2]
        return null
      }
    },

    // mounted: {},

    methods: {
      // 获取商品列表
      async getCateList() {
        const { data: res } = await this.$http.get('categories')
        if (res.meta.status !== 200) return this.$message.error('获取商品分类失败！')
        this.catelist = res.data
        // console.log(this.catelist);
      },
      // 下拉列表框的change事件
      handleChange() {
        if (this.addForm.goods_cat.length !== 3)
          this.addForm.goods_cat = []
      },
      // 联级列表框的点击切换前的钩子
      beforeTabLeave(activeName, oldActiveName) {
        // console.log(activeName);
        // console.log(oldActiveName);
        if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
          this.$message.error("请选择你要添加的商品分类！")
          return false
        }
      },
      // tap被选中时触发
      async tabClicked() {
        // console.log(this.activeIndex);
        // 访问动态参数面板
        if (this.activeIndex === '1') {
          const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, { params: { sel: 'many' } })
          if (res.meta.status !== 200) return this.$message.error('获取动态参数失败')
          res.data.forEach(item => {
            item.attr_vals = item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
          })
          this.manyTableData = res.data
        }
        else if (this.activeIndex === '2') {
          const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, { params: { sel: 'only' } })
          if (res.meta.status !== 200) return this.$message.error('获取静态参数失败')
          this.onlyTableData = res.data
        }
      },
      // 点击图片预览的处理事件
      handlePreview(file) {
        // console.log(file);
        this.previewPath = file.response.data.url
        this.previewVisible = true
      },
      // 点击移除图片的处理函数
      handleRemove(file) {
        // 1.获取将要删除图片的临时路径
        const filePath = file.response.data.tmp_path
        // 2.从pics数组中，找到这个图片对应的索引值
        const i = this.addForm.pics.findIndex(x => x.pic === filePath)
        // 3.调用数组的splice方法，把图片信息对象，从pics数组中移除
        this.addForm.pics.splice(i, 1)
      },
      // 监听图片上传成功的事件
      handleSucess(response) {
        // 1.拼接得到一个图片信息对象
        const picInfo = { pic: response.data.tmp_path }
        // 2.将图片信息对象,push到pics数组中
        this.addForm.pics.push(picInfo)
        // console.log(this.addForm);
      },
      //使用递归的方式实现数组、对象的深拷贝
      deepClone1(obj) {
        //判断拷贝的要进行深拷贝的是数组还是对象，是数组的话进行数组拷贝，对象的话进行对象拷贝
        var objClone = Array.isArray(obj) ? [] : {};
        //进行深拷贝的不能为空，并且是对象或者是
        if (obj && typeof obj === "object") {
          for (var key in obj) {
            if (obj.hasOwnProperty(key)) {
              if (obj[key] && typeof obj[key] === "object") {
                objClone[key] = this.deepClone1(obj[key]);
              } else {
                objClone[key] = obj[key];
              }
            }
          }
        }
        return objClone;
      },
      // 添加商品按钮的点击响应事件
      add() {
        this.$refs.addFormRef.validate(async valid => {
          if (!valid) return this.$message.error("请检查表单数据是否填写完整！")
          // 执行添加的业务逻辑
          const newForm = this.deepClone1(this.addForm)
          newForm.goods_cat = newForm.goods_cat.join(',')
          // 处理动态参数
          this.manyTableData.forEach(item => {
            const newInfo = { attr_id: item.attr_id, attr_value: item.attr_vals.join(' ') }
            this.addForm.attrs.push(newInfo)
          })
          // 处理静态属性
          this.onlyTableData.forEach(item => {
            const newInfo = { attr_id: item.attr_id, attr_value: item.attr_vals }
            this.addForm.attrs.push(newInfo)
          })
          newForm.attrs = this.addForm.attrs
          // console.log(newForm);
          // 发起请求
          // 商品名称必须唯一
          const { data: res } = await this.$http.post('goods', newForm)
          if (res.meta.status !== 201) return this.$message.error('添加商品失败！')
          this.$message.success('添加商品成功！')
          this.$router.push('/goods')
        })
      },
    }
  }

</script>
<style lang='less' scoped>
  .cat_opt {
    margin: 15px 0;
  }

  .el-cascader {
    width: 300px !important;
  }

  .el-tag {
    margin: auto 5px;
  }

  .input-new-tag {
    width: 120px;
  }

  .el-checkbox {
    margin: 0 10px 0 0 !important;
  }

  .previewImg {
    width: 100%;
  }

  .addbtn {
    margin-top: 10px;
    float: right;
  }
</style>